Why do some parents refuse to vaccinate their children? Why do some people keep guns at home, despite scientific evidence of risk to their family members? And why do people use antibiotics for illnesses they cannot possibly alleviate? When it comes to health, many people insist that science is wrong, that the evidence is incomplete, and that unidentified hazards lurk everywhere. In Denying to the Grave, Gorman and Gorman, a father-daughter...